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  • 5.2

    import java.util.Random;
    
    
    public class test {
        private int a;
        private int b;
        int c;
        public int  jia(int a,int b)
        {
        
            System.out.println(""+a);
            System.out.println(""+b);
            c = a+b;
            System.out.println("a+"+"b"+"="+(a+b+"
    "));
            return c;
            
        }
        public int  jian(int a,int b)
        {
            
            System.out.println(""+a);
            System.out.println(""+b);
            c=a-b;
            System.out.println("a-"+"b"+"="+(a-b)+"
    ");
            return c;
            
            
        }
        public int Cheng(int a,int b)
        {   
            System.out.println(""+a);
            System.out.println(""+b);
            c=a*b;
            System.out.println("a*"+"b"+"="+(a*b)+"
    ");
            return c;
        }
        public double  Chu(int a,int b)
        {
            double c;
            c=(double) (Math.round((a/b)*100/100.0));
            System.out.println(""+a);
            System.out.println(""+b);
            if(b!=0)
                System.out.println("c=a/b="+(c)+"
    ");
            else
                throw new ArithmeticException();
                System.out.println("分母不能为0!");
                  
                return c;
        }
    
        /**
         * @param args
         */
        public static void main(String[] args) {
            // TODO Auto-generated method stub
             test Jia=new test();
             Jia.jia(5, 3);
             test Jian=new test();
             Jian.jian(6,2);
             test cheng=new test();
             cheng.Cheng(6,5);
             test chu=new test();
             chu.Chu(3,0);
             
        }
    
    }
    import java.util.Random;
    
    
    public class FZ {
        private int a;
        private int b;
        int c;
        public int  jia(int a,int b)
        {
        
            System.out.println(""+a);
            System.out.println(""+b);
            c = a+b;
            System.out.println("a+"+"b"+"="+(a+b+"
    "));
            return c;
            
        }
        public int  jian(int a,int b)
        {
            
            System.out.println(""+a);
            System.out.println(""+b);
            c=a-b;
            System.out.println("a-"+"b"+"="+(a-b)+"
    ");
            return c;
            
            
        }
        public int Cheng(int a,int b)
        {   
            System.out.println(""+a);
            System.out.println(""+b);
            c=a*b;
            System.out.println("a*"+"b"+"="+(a*b)+"
    ");
            return c;
        }
        public double  Chu(int a,int b)
        {
            double c;
            c=(double) (Math.round((a/b)*100/100.0));
            System.out.println(""+a);
            System.out.println(""+b);
            if(b!=0)
                System.out.println("c=a/b="+(c)+"
    ");
            else
                throw new ArithmeticException();
                System.out.println("分母不能为0!");
                  
                return c;
        }
    
        /**
         * @param args
         */
        public static void main(String[] args) {
            // TODO Auto-generated method stub
             FZ Jia=new FZ();
             Jia.jia(5, 3);
             FZ Jian=new FZ();
             Jian.jian(6,2);
             FZ cheng=new FZ();
             cheng.Cheng(6,5);
             FZ chu=new FZ();
             chu.Chu(3,0);
             
        }
    
    }

    总结:了解了测试后发现测试是一个很好的功能,它能及时发现错误,提高开发效率。

            如果对测试还不是很懂的同学可以在慕课网学习,那里有详细方法。

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  • 原文地址:https://www.cnblogs.com/lixuanzong/p/4488386.html
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